Certified Paraoptometric (CPO) Practice Exam 2025

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Prepare for the Certified Paraoptometric Exam with our comprehensive quiz featuring multiple-choice questions. Each question is accompanied by hints and explanations, helping you build your knowledge and confidence. Get ready to excel in your career!

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Which test is commonly used to diagnose glaucoma?

Pachymetry
Pupil dilation
Tonometry
Optical Coherence Tomography

The correct answer is: Tonometry

Tonometry is the most commonly used test to diagnose glaucoma because it measures intraocular pressure (IOP), which is a key factor in the diagnosis of this eye disease. Glaucoma is characterized by increased IOP, which can lead to damage to the optic nerve and result in vision loss. While other tests, such as pachymetry, can provide valuable information about corneal thickness and contribute to glaucoma assessment, they do not directly measure the pressure within the eye. Pupil dilation is often performed to inspect the internal structures of the eye and may help in the overall evaluation but is not specific for glaucoma diagnosis. Optical Coherence Tomography (OCT) is a useful imaging technique that provides detailed images of the optic nerve and can help in assessing damage caused by glaucoma, but it is not the primary method for initial diagnosis. Thus, tonometry remains the standard test performed in routine eye exams to screen for and diagnose glaucoma based on the measurement of IOP.